Sheet metal flashing



April s, 1938. H, SWAY 2,112,936

SHEET METAL FLASHING Filed Dec. ll, 1936 INV ENT OR.

Afa/ffy Sway Patented Apr. 5, 1938 UNITED STATES PATENT OFFICE 8 Claims.

Ihis invention relates to an improved sheet metal flashing formed so as to make a new type stucco guard such as may be used by the building trades for securing a Weathertight joint wherever it is desired or necessary to have stucco, or similar cementitious material, tightly abut wooden surfaces.

Another object of this invention is to provide an improved type of flashing which will prevent the shrinkage of stucco away from abutting wooden structures as the stucco dries out, and/or prevent the cracking which occurs when wood (green) dries out and pulls away from the abutting stucco.

Another object of this invention is to provide a new means of conducting away moisture which would otherwise be absorbed by the stucco mass as well as the wooden paneling, and which oftimes will seep into the inner plaster of a room spoiling it as well as the wallpaper on it.

The ease with which this new type flashing may be adapted to fit any shape opening or other type of flt where stucco and wood are to abut will be readily seen.

The foregoing and other objects are attained by the means described herein and disclosed in the accompanying drawing, in which:

Fig. l is a perspective view of a gable embodying the present invention.

Fig. 2 is a cross-sectional view taken on the line 2 2 of Fig. 1.

Fig. 3 is a View similar to Fig. 2 and showing a modified form of .the invention.

Fig. 4 is a View similar to Fig. 2 and showing another modified form of the invention.

The present invention is directed to improving the methods employed by the building trade in butt joining stucco panels with Wooden panels by means of an improved sheet metal flashing.

Referring to Fig. 2, character I represents a cross-sectional view of a wooden panel, character 2 indicates the wooden sheathing used by the building trade as a base for the exterior surface of a building. It is to be understood that the customary weatherproof paper, furring and metal lto the sheathing 2 and thence along for a short distance flush with the sheathing. The end of the metal flashing 3 may abut the lath 4, which is fastened to the sheathing 2 in any manner common in the art.

The metal flashing may be fastened to the wooden panel I or to the sheathing 2, or to both, by means of nails or small screws.

When plastic stucco is applied to this surface, it will completely lill up the space outside the., metal flashing as well as the space in and around the lath, so that when'drying occurs a key arrangement will be formed with the metal flashing. It is .to be understood that the rib 33 may be perforated to thus provide a key for the plastic.

Due to the design of the metal flashing, the stucco on drying will be tightly wedged and held in place by the key elect of the bottom part of the flashing, and therefore the usual tendencyy of the stucco to pull away will be greatly lessened, and further, the usual shrinkage of stucco from wood will be greatly diminished because by the use of this flashing the stucco is placed in contact with sheet metal for which it has great.

aflinity, instead of in contact with the wood paneling itself.

Attention is directed to the fact that should some shrinkage occur between the stucco and the metallic surface of the flashing, there is still tight weatherproof seal around the wooden panel extending down around the side of the panel, around under .the stucco over to the lath. Therefore, should moisture or any of the other elements be driven into this opening, the injuriousy action of said elements is stopped by the metal flashing.

In the event that rain would come in through .the opening between the metal flashing and the stucco, it will be conducted away by means of the trough formed by the metal ashing and thereby it will afford an effective means of drainage for the abutting stucco paneling.

Fig. 3 shows a modification of the metal flashing guard just described. 'Ihe modification liesI` in the method of anchorage to the wooden panel I I, as well as to the method of anchoring the end of the flashing guard abutting the latch. A lip I6 is bent along the edge of the sheet metal flashing which ts into groove I1 which is cut into the wooden panel to accommodate it. The metal ashing is then brought across the outer face of the wooden panel and thence down at right angles flush against the side of the sheathing I8, thence for a short distance across on the sheathing before being bent back over itself at an angle approximating l35 degrees with the sheathing, where it is terminated. This end is securely held in place by means of a metal cleat, I9 which abuts the lath 20. The advantage of this type flashing guard lies in the fact that there is a positive lock formed between the ashing and the outer surface of the wooden paneling.

Fig. 4 illustrates another modification of the two flashing guards just described, the distinction being primarily in that the metal flashing is anchored in the side of the wooden panel 2|, below the surface of the stucco when put on. In this manner the flashing is concealed from sight, and cannot be detected from the outside. The metal flashing 23 is bent so as to form a lip 24 which fits into groove 25 which is cut in the side of panel 2|. This groove is cut so as to be below the outer surface line of the stucco in its completed form. The metal flashing guard is then bent at right angles so as to be flush with the side of panel 2I and continued down to the sheathing 22. It is then bent at right angles back so as to fit flush with the sheathing for a short distance to the key formation 26 which is formed by bending the flashing back over itself at an angle approximating 135 with the sheathing, but it is not terminated here as in Fig. 3, but is then bent back on itself down to the sheathing 22 which it parallels and is iiush with a short distance to abut the lath, where it terminates.

In use the ends of these metal flashing guards will be so connected at the joints as to make a weather-proof seal, and although kthe building trade has for a number of years been accustomed to provide water-tables wherever water would soak in over door frames, window frames, etc., this metal flashing guard provides a water-table effect all around the joints wherever stucco and wooden paneling are to butt, and further it provides a tight mechanical bond on all surfaces heretofore unprotected.

In those instances where the metal flashing is exposed to the elements, it may be made of copper or of galvanized sheet metal or other sheet metal and painted.

Wherever the term wooden panel is used, it is meant to include and embrace all instances where stucco, or similar building substances, is to abut wood trim or wooden work such as is found around Window frames, door frames` and the like and also to include, all cases where decorative paneling (wooden) is to abut stucco work. Whether the wooden panels are flush with the stucco panels, or whether they extend out from the stucco panels a short distance is immaterial.

By carefully considering the description in connection with the drawing, a clear understanding of the construction and application will be obtained.

Changes in shape, size and rearrangement of details coming within the field of invention may be resorted to in actual practice if desired.

Having thus described the invention, what is claimed is:

1. 'I'he combination with a building comprising sheathing, means of the class of lath for supporting a cementitious mass over the sheathing, and trim exposed in part to the elements and having a portion disposed adjacent the sheathing whereby to there provide a joint, of metal flashing extending over said joint, the edge of the iiashing adjacent the trim having element excluding contact with the trim and the portion of the flashing adjacent its otherv edge having a key forming rib therein for locking cementitious material to the iiashing.

2. In a building comprising sheathing, means of the class of lath for receiving and supporting a cementitious covering material for the sheathing, and trim exposed in part to the elements and so related to the sheathing whereby to provide a joint along the trim, the combination with the trim and the sheathing of fiashing extending along the trim and having one of its longitudinal edges in contact with the trim and extending over said joint for excluding the elements from said joint, the opposite longitudinal edge of the flashing being secured to the sheathing, said flashing having a key forming rib extending between its said edges and disposed over the sheathing for receiving and locking cementitious material over that portion of the iiashing extending over said joint.

3. The combination with a building comprising sheathing, means of the class of lath for receiving and supporting a cementitious mass over the sheathing, and trim exposed in part to the elements and having a portion disposed adjacent the sheathing whereby to there provide a joint, of a sheet metal iiashing having an external trim contacting flange and internal sheathing contacting flange which houses a key forming rib whereby cementitious material is locked relative to the flashing, and an intermediate leg extending between the trim contacting ange and sheathing contacting ange whereby an element excluding joint is obtained between the trim, cementitious mass and sheathing.

4. In combination with a building comprising sheathing, means of the class of lath for receiving and supporting a cementitious mass over the sheathing, and trim exposed in part to the elements and so related to the sheathing whereby to provide a joint along the trim, the combination with the trim and sheathing of flashing comprising a base element which houses a key forming rib extending over the sheathing for receiving and locking cementitious material over that portieri of the iiashing adjacent said joint, a side element disposed at right angles to said base element and separating the cementitious material from the trim along the line of jointure, and an outer member bent at right angles to the side member over the trim terminating in contact therewith whereby a weather excluding joint is formed between the trim, cementitious material and sheathing.

5. 'I'he combination with a building comprising sheathing, means of the class of lath for supporting a cementitious mass over the sheathing and trim exposed in part to the elements and having a portion disposed adjacent the sheathing whereby to there provide a joint, of a sheet metal flashing comprising an outer face flush with the exposed face of the trim boards, a central portion having a configuration in similitude'of the joint between the trim and cementitious material and extending therebetween, and a base member iiush with the sheathing adjacent the joint under the cementitious material housing a key forming rib for receiving and locking cementitious material in place relative to the joint formed with the trim.

6. The combination with a building comprising sheathing, means of the class of lath for supporting a cementitious mass over the sheathing and trim exposed in part to the elements and having a portion `disposed adjacent the sheathing whereby to there provide a joint, of a sheet metal flashing formed to lap over the outer side of the trim board, extend inward to the sheathing between the trim and cementitious material adjacent thereto, thence at right angles extending across ush with the sheathing under the cementitious material, and means whereby the cementitious material is locked in place relative to the joint and supporting sheathing.

'7. In combination with a building comprising sheathing, means of the class of lath for receiving and supporting a cementitious mass over the sheathing, and trim exposed in part to the elements and so related to the sheathing whereby to provide a joint along the trim, the combination with the trim and sheathing of ashing comprising a base element which houses a key forming rib extending over the sheathing for receiving and locking cementitious material over that portion of the flashing adjacent said joint, a side member disposed at right angles to said base member extending outward from the sheathing between the trim and cementitious material a distance less than the thickness of trim boards, and

a trim locking lip bent at right angles to said side member engaging a complementary groove cut in the end face of the trim whereby a Weather excluding joint is secured between the trim, cementitious material and sheathing.

8. The combination with a building comprising sheathing, means of the class of lath for supporting a cementitious mass over the sheathing and trim exposed in part to the elements and having a portion disposed adjacent the sheathing whereby to there provide a joint, of a sheet metal flashing having a trim contacting flange terminating in a trim locking lip bent at right angles to the ange face and engaging a complementary groove cut into the outer face of the trim, an intermediate member disposed at right angles to the trim contacting flange extending inwardly between the end face of the trim and cementitious material down to the sheathing, a base member disposed at right angles to said intermediate member extending across-and flush with the sheathing under the cementitious ma teria] adjacent the joint and terminating in a lip to receive and lock the cementitious material formed by bending.back the base member on itself at an angle greater than a right angle, and means for anchoring said lip to the sheathing whereby a weather-tight joint is secured between the trim, Vcementitious sheathing.

material and HENRY SWAY. 

